Orbital Welding Device with Electrode Ring Segment

Abstract

The invention relates to an orbital welding device with a welding head that has a receptacle for positioning a joining area of two joining partners, in particular a fitting and a pipe end which joining partners are tubular at least in the joining area, wherein The welding head has an electrode ring segment which is arranged in the circumferential direction around the receptacle and is mounted in such a way that the electrode ring segment can be rotated about an imaginary longitudinal axis of the receptacle. The electrode ring segment has an electrode holder for a welding electrode and/or a welding electrode. The welding head has drive means, in particular one or more driven drive wheels, for driving the electrode ring segment about the imaginary longitudinal axis. The invention further relates to a system, with such an orbital welding device and an orbital welding method.

1 . An orbital welding device
 with a welding head that has a receptacle for positioning a joining area of two joining partners, in particular a fitting and a pipe end which joining partners are tubular at least in the joining area,   wherein   the welding head has an electrode ring segment which is arranged in the circumferential direction around the receptacle and is mounted in such a way that the electrode ring segment can be rotated about an imaginary longitudinal axis of the receptacle,   the electrode ring segment has an electrode holder for a welding electrode and/or a welding electrode and   the welding head has drive means, in particular one or more driven drive wheels, for driving the electrode ring segment about the imaginary longitudinal axis.   
     
     
         2 . OrbitalThe orbital welding device according to  claim 1 ,
 wherein the welding head has a plurality of driven drive wheels which are arranged such that, in each rotational position of the electrode ring segment about the imaginary longitudinal axis, at least one of the plurality of drive wheels, is coupled to the electrode ring segment.   
     
     
         3 . The orbital welding device according to  claim 1 ,
 wherein the electrode ring segment is designed as a bevel wheel segment, in particular a bevel gear wheel segment, and the one or more drive wheels; are designed as drive bevel wheels, in particular drive bevel gear wheels, wherein preferably, in each rotational position of the electrode ring segment around the imaginary longitudinal axis, at least one of the plurality of drive gear wheels meshes with the bevel gear wheel segment.   
     
     
         4 . The orbital welding device according to  claim 1 ,
 wherein the plurality of drive wheels, are arranged in the circumferential direction around the receptacle.   
     
     
         5 . The orbital welding device according to  claim 1 ,
 wherein at least two of the plurality of drive wheels are rotationally coupled to one another, preferably by coupling wheels in particular coupling bevel wheels, provided between the drive wheels.   
     
     
         6 . The orbital welding device according to  claim 1 ,
 wherein the orbital welding device comprises an electrode drive in particular a motor, which is rotationally coupled to at least one of the drive wheels for driving the same.   
     
     
         7 . The orbital welding device according to  claim 1 ,
 wherein contacting means are provided for electrically contacting the electrode ring segment or a welding electrode on the electrode ring segment and for electrical connection to a welding current source or to a connection for a welding current source   
     
     
         8 . The orbital welding device according to  claim 1 ,
 wherein a contacting ring segment is arranged next to the electrode ring segment which contacting ring segment is electrically conductively connected to a welding current source or to a connection for a welding current source   
     
     
         9 . The orbital welding device according to  claim 1 ,
 wherein in the electrode ring segment is designed in multiple parts with a drive ring segment for coupling with the drive wheels and with a conductor ring segment for contacting the electrode ring segment.   
     
     
         10 . The orbital welding device according to  claim 1 ,
 wherein in pressing means are provided which are designed to press the electrode ring segment and one or more contacting elements of the contacting means, in particular the contacting ring segment against one another.   
     
     
         11 . The orbital welding device according to  claim 10 ,
 wherein the pressing means comprise a plurality of pressing elements in particular spring-loaded pressing elements, which are distributed in the circumferential direction.   
     
     
         12 . The orbital welding device according to  claim 1 ,
 wherein in the orbital welding device comprises a welding current source which is electrically connected to the electrode ring segment, the welding electrode and/or the electrode holder therefor.   
     
     
         13 . The orbital welding device according to any  claim 1 ,
 wherein   the welding head has a first opening and a second opening opposite the first opening, between which the receptacle extends in the longitudinal direction,   the welding head is adjustable between an open position and a closed position, wherein the welding head in the open position, has an insertion opening connecting the first and second opening for inserting a joining area of two joining partners, which are tubular at least in the joining area, into the receptacle, and wherein the insertion opening is at least partially closed in the closed position.   
     
     
         14 . The orbital welding device according to  claim 13 ,
 wherein   the electrode ring segment has a ring segment opening in the circumferential direction, which forms part of the insertion opening when the welding head is in the open position.   
     
     
         15 . The orbital welding device according to  claim 1 ,
 wherein the orbital welding device, comprises a hand-held device which comprises the welding head and preferably a handle part connected to the welding head-.   
     
     
         16 . The orbital welding device according to  claim 1 ,
 wherein a control device is provided which is configured to control the orbital welding device in such a way that a weld seam consisting of a circumferential chain of joining spots is produced on two joining partners arranged in the receptacles.   
     
     
         17 . A system
 with an orbital welding device according to  claim 1 , and   with a fitting.   
     
     
         18 . An orbital welding method, in particular carried out with an orbital welding device according to  claim 1 ,
 in which two tubular joining partners, which are tubular at least in a joining area are arranged relative to each other, in particular in a lapped joint,   in which a chain of joining spots extending in the circumferential direction of the joining partners is produced in the joining area, which chain connects the joining partners in a material-locking manner.   
     
     
         19 . The orbital welding method according to  claim 18 ,
 wherein, for producing the chain of joining spots, the electrode ring segment is moved in the circumferential direction, in particular over an angle of at least 340°, in particular at least 360°.